This chapter argues that naturalization, the process of transforming aliens into subjects through law, was a crucial process in eighteenth-century law and literature. The attempted passage of several naturalization bills across the seventeenth and eighteenth centuries generated conflicting accounts about whether nationality could be a fictional process. Samuel Richardson and Maria Edgeworth take up these conflicting accounts in their novels. In Sir Charles Grandison (1753–54), Richardson upholds the traditional view, which considered naturalization to be part of a return to an original common human nature expressed in natural law. In Harrington (1817), by contrast, Maria Edgeworth endorses a newer, Lockean, contractual and voluntarist approach: the idea that naturalization could be achieved through a Parliamentary statute without the necessity of natural law. These case studies reveal how novelists responded and contributed to naturalization’s transformation from a supposedly natural process to an explicitly fictional process.